Product Core Brief
- Model: MVME147SRF
- Brand: Motorola Computer Group
- Series: MVME147 VMEbus single board computers
- Core Function: 68030-based VME master/slave processor without Ethernet option
- Product Type: VMEbus SBC (A32/D32 master/slave, system controller capable)
- Key Specs: MC68030 @ 16 MHz | 4 MB DRAM | 4 × RS-232 | SCSI DMA | No Ethernet
- Condition: New Original (New Surplus) — verify ROM population and jumper settings
Product Introduction
Motorola MVME147SRF delivers MC68030 processing at 16 MHz on the VMEbus with 4 MB shared DRAM, four serial ports, and SCSI interface for high-performance embedded applications. The SRF variant omits Ethernet transceiver to reduce cost and power while retaining full A32/D32 VME master/slave capability and system controller functions.
Target deployments include multiprocessor VME systems for telecom switches, radar processing, and industrial RTUs where serial and SCSI connectivity meet 68000-family ISA requirements. Four EPROM sockets support boot/debug firmware; battery-backed SRAM preserves critical data across power cycles.
Frequently Asked Questions
Q: Does the MVME147SRF support hot-swapping in a VME chassis?
A: VMEbus prohibits live insertion; power down the crate before installing the MVME147SRF. At 2.5–3.5 A @ 5 VDC draw it stresses crate supplies—verify +5 V/+12 V/−12 V rails post-install, check P1/P2 seating, and monitor SYSFAIL line before system boot to avoid bus hang conditions.
Q: Is the MVME147SRF obsolete, and what are replacement options?
A: Obsolete since late 1990s; full MVME147 series (with Ethernet) or PowerPC successors like MVME2400/2600 provide performance upgrades. SRF lacks LAN but matches pinout; code migration from 68030 to PPC requires register and MMU changes. Third-party VME SBCs (Tundra, Force) offer drop-in alternatives with custom firmware ports.
Q: Will I lose VME application code or configuration when replacing the board?
A: EPROM/EEPROM contents persist; DRAM clears on power loss unless shadowed to NVRAM. Most common failure mode: undocumented VME address maps and serial flow control jumpers—image all four ROM sockets with EPROM reader, record J1-J20 positions, verify SCSI ID before swap to prevent address decoder conflicts.
Q: Are these MVME147SRF boards factory-new or refurbished when sold as surplus?
A: Surviving stock traces to decommissioned military VME crates or telco central offices as New Surplus, not Motorola production. Demand clean gold fingers on P1/P2, date codes >1995 on 68030/DRAM, factory silkscreen for “New Original” validation; electrolytic cap dome or socket oxidation marks field use—require 72-hour burn-in with VME diagnostics.
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